A Seat that contains pockets of material that only melt when the Temperature reaches too high for hot conditions. If your child is Parked in a Vehicle for too long and has ample oxygen [ Also Included in One of my Oxygen Supply Ideas ] then, that material starts too break down and cool the seat [ And Occupant ] too a much cooler Temperature. Thusly, the Baby or child or Adult, if neccessary, never over heats.